CN115744699A - Double-power winch system, control method and piling machinery - Google Patents
Double-power winch system, control method and piling machinery Download PDFInfo
- Publication number
- CN115744699A CN115744699A CN202211488309.0A CN202211488309A CN115744699A CN 115744699 A CN115744699 A CN 115744699A CN 202211488309 A CN202211488309 A CN 202211488309A CN 115744699 A CN115744699 A CN 115744699A
- Authority
- CN
- China
- Prior art keywords
- motor
- brake
- valve
- oil
- hydraulic motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a hoisting system, which aims to solve the problem that the hoisting system of the existing piling machinery has no energy recovery.A double-power hoisting system, a control method and the piling machinery are constructed, wherein the double-power hoisting system comprises an engine, a hydraulic motor for driving a hoisting assembly, a control valve bank for controlling the hydraulic motor, a main pump for supplying oil to the control valve bank and driven by the engine, a generator driven by the engine and connected with a power battery, a brake for braking the hoisting assembly, an operating handle, a motor and the like, and the motor is connected with the power battery and used for driving the hoisting assembly or being dragged backwards to generate electricity; the controller controls the working modes of the brake and the motor according to the winding signal or the unwinding signal of the operating handle, and controls the working state of the hydraulic motor through the control valve group according to the load condition of the motor. The winch system has double power, and the potential energy reduced when the motor is arranged below the working device is absorbed during the unreeling operation, so that the energy recovery is realized, and the heating of a hydraulic system is reduced.
Description
Technical Field
The invention relates to a hoisting system, in particular to a double-power hoisting system, a control method and piling machinery.
Background
The piling machinery, such as a rotary drilling rig, a continuous wall trenching machine and the like, is provided with a winch for lifting and lowering a working device, such as a hydraulic grab bucket, a power head and the like.
The winch assembly of the existing winch comprises a winding drum and a speed reducer connected with the winding drum, and a hydraulic motor drives the speed reducer to drive the winding drum. The operator sends the signal of telecommunication for the controller through the operation of guide's handle, and the controller output signal of telecommunication gives main pump, main control valve, and the main pump outputs hydraulic oil and gives main control valve, hydraulic motor, and hydraulic motor drives the speed reducer and realizes the hoist and promotes, transfer the action, cycle work. The hydraulic motor is provided with the balance valve, when the hydraulic motor rotates, return oil of the hydraulic motor needs to flow through the damping hole in the balance valve, and the return oil of the hydraulic motor is limited through the damping hole, so that the rotating speed of the hydraulic motor is limited to be too fast, and stalling in the descending process is prevented.
In the hoisting process, the hydraulic motor works at full power, the main pump supplies oil to the main valve and the hydraulic motor, the energy loss among all elements is large, and the fuel oil energy utilization rate is low due to the problem that the transmission efficiency of a hydraulic system is low. In the descending working process of the winch, due to the influence of heavy objects on the winch, the winch is greatly pulled, the descending speed of the winch can be accelerated, the winch acts on the hydraulic motor, the balance valve on the hydraulic motor is always in a throttling state, the hydraulic system is enabled to generate heat seriously, and the gravitational potential energy is completely converted into heat consumption, so that the energy waste is realized.
Disclosure of Invention
The invention aims to solve the technical problem that a piling machinery hoisting system does not have energy recovery, and provides a double-power hoisting system, a control method and a piling machinery, so that energy can be recovered when a steel wire rope is released by hoisting.
The technical scheme for realizing the purpose of the invention is as follows: construct a double dynamical hoist system, include the engine, be used for driving the hydraulic motor of hoist assembly, be used for controlling the valve unit of hydraulic motor, to the valve unit oil feed and by the engine driven main pump, its characterized in that still includes:
the generator is driven by the engine and is connected with the power battery;
the brake is used for braking the winch assembly and is in a braking state in a normal state;
the operating handle is used for winding and unwinding the winding drum;
the motor is connected with the power battery and is used for driving the hoisting assembly or generating electricity by the reverse dragging rotation of the hoisting assembly and storing the generated electric energy in the power battery;
the detection device is used for detecting the motor load;
the controller is used for controlling the working modes of the brake and the motor according to the winding signal or the unwinding signal of the operating handle, and when the load of the motor is greater than a corresponding preset value, the controller controls the control valve group and the hydraulic motor to enable the hydraulic motor to be in a rotating working state, and the torque direction of the hydraulic motor is the same as that of the motor; and when the load value of the motor is smaller than the corresponding preset value, the control valve group is controlled to enable the hydraulic motor to be in a non-working state.
In the invention, the engine drives the generator to generate electricity and store the electricity in the power battery, the motor drives the winch assembly to wind the steel wire rope by using the electricity of the power battery during winding operation, and the working device drives the winch assembly to rotate the counter-dragging motor through the steel wire rope during unwinding operation, so that the motor generates electricity and stores the electricity in the power battery, energy recovery is realized, and meanwhile, the heating of a hydraulic system is reduced. When the winding and unwinding operation is performed, the hydraulic motor can be controlled to participate in the winding and unwinding operation.
When the motor is in a motor working mode, the detection device can calculate the power of the motor as the load of the motor by detecting the torque of the motor or detecting the related parameters of the motor, and if the load value of the motor is smaller than the preset value when the motor is used as the motor, the hydraulic motor is in a non-working state by controlling the control valve group and is only driven by the motor; on the contrary, if the load value of the motor is larger than the preset value when the motor is used as the motor, the hydraulic motor is in a working state by controlling the control valve group, the hydraulic motor obtains pressure oil from the main pump and is used as a driving part to convert hydraulic energy into mechanical energy, the mechanical energy and the mechanical energy are used for driving the winch assembly together, and the steel wire rope is wound to realize the lifting of the working device.
When the motor is in a generator working mode, the detection device can calculate the power generation power of the motor as the load of the motor by detecting the rotating speed of the motor or detecting the relevant parameters of the motor, if the load value of the motor is smaller than the preset value when the motor is used as a generator, the hydraulic motor is in a non-working state by controlling the control valve group, and the kinetic energy is reduced when the motor rotates to generate power and absorb the working device to descend; and if the load value of the motor is larger than the preset value when the motor is used as a generator, the kinetic energy released by the descending of the working device is larger than the maximum value of the energy allowed to be absorbed by the motor, the hydraulic motor is in a working state by controlling the control valve group, and the hydraulic motor obtains pressure oil from the main pump as a driving part to slow down the rotating speed of the hoisting assembly together with the motor, so that the working device descends at a safe speed.
In the dual-power winch system, the control valve group comprises a main control valve and an enabling control valve, wherein two working oil ports of the main control valve are correspondingly connected with two working oil ports of a hydraulic motor, the enabling control valve is used for controlling whether torque is transmitted between the hydraulic motor and a winch assembly, and the main control valve and the enabling control valve are electromagnetic valves connected with a controller; and the hydraulic motor is provided with a balance valve for limiting the oil return flow of the hydraulic motor. Furthermore, the enabling control valve is a two-position two-way electromagnetic valve, two ends of which are respectively connected with two working oil ports of the hydraulic motor; or a clutch is arranged between the output shaft of the hydraulic motor and the winch assembly, and the enabling control valve is arranged on the clutch control oil path and used for controlling the clutch to be connected or disconnected.
In the dual-power winch system, the brake comprises a brake release oil cylinder and an electric control brake release valve connected with the brake release oil cylinder, the electric control brake release valve is connected with the main pump through a pressure reducing valve, the electric control brake release valve is electrically connected with the controller, and the brake release oil cylinder is connected with the hydraulic oil tank through a damping hole and a pipeline. When the electric control brake release valve is in a power-off cut-off state, the piston of the brake extrudes oil in the brake release oil cylinder under the action of the brake spring, so that the oil flows to the hydraulic oil tank through the damping hole and the pipeline, and the brake realizes braking under the action of the brake spring. When the electric control brake release valve is electrified, pressure oil provided by the main pump flows to a brake oil cylinder of the brake through the pressure reducing valve and the electric control brake release valve, and pushes the piston to overcome the elasticity of the brake spring, so that brake release is realized. When the brake is released, a small part of oil can be lost from the damping hole, and the lost oil is supplemented by the oil flowing in through the pressure reducing valve and the electric control brake release valve.
In the dual-power winch system, the control valve group further comprises a hydraulic control braking relieving valve group oil way, and the hydraulic control braking relieving valve group oil way comprises:
the two oil inlet ends of the shuttle valve are communicated with the two working oil ports of the main control valve;
the oil inlet end and the hydraulic control end of the stop valve are both connected with the oil outlet end of the shuttle valve, and the oil inlet end and the oil outlet end are communicated when the pressure of the oil inlet end is greater than a preset pressure value;
and the oil inlet end and the oil outlet end of the constant value pressure reducing valve are correspondingly connected with the oil outlet end of the stop valve and the brake release oil cylinder.
When the hydraulic motor is used alone for winding and unwinding, the controller controls the main control valve to change the direction, one working oil port of the main control valve outputs high-pressure oil, the other working oil port is used for returning oil, when the pressure output by the working oil port reaches a preset value, the pressure oil acts on a hydraulic control end of the stop valve through the shuttle valve to enable the stop valve to be conducted, the high-pressure oil flows to the brake release oil cylinder after being decompressed by the fixed-value decompression valve, the brake is enabled to perform brake release action, the hydraulic motor can generate corresponding torque under the action of the pressure oil at the moment, and the brake release of the brake cannot cause the working device to pull the winch assembly to descend quickly through the steel wire rope.
In the double-power hoisting system, the double-power hoisting system also comprises a tension sensor for detecting the tension of the hoisting steel wire rope and an acquisition device for acquiring the torque of the motor;
the controller is also used for calculating the braking torque of the brake according to the tension of the steel wire rope, the torque of the motor and the design parameters of the winch assembly after acquiring the winding signal of the operating handle and outputting a control signal for releasing the braking action of the brake when the braking torque is smaller than a preset value.
The gravity of the working device acts on the steel wire rope, a torque in the unwinding direction is generated on the winding drum, the torque is transmitted to a brake connecting shaft connected with the brake through a gear shaft system in the speed reducer, and the torque on the motor rotating shaft also acts on the brake connecting shaft through a shaft. When the brake is not released, the braking torque acted on the brake connecting shaft by the brake is equal to the difference value between the torque acted on the brake connecting shaft by the moment of the winding drum and the torque acted on the brake connecting shaft by the motor, when the braking torque is smaller than a preset value, for example, is close to zero, the torque of the rotating shaft of the motor is equivalent to the tension of the steel wire rope through the acting force of the shafting on the winding drum, the brake of the brake is released at the moment, the working device cannot suddenly drop, and the operation is stable.
The technical scheme for realizing the purpose of the invention is as follows: a control method of a double-power winch system is constructed and used for controlling the double-power winch system, and is characterized by comprising the following steps:
the controller outputs a brake control signal and a motor control signal according to the acquired winding signal or unwinding signal of the operating handle, so that the motor correspondingly works in a motor mode or a generator mode; and obtaining a motor load value, controlling the control valve group to enable the hydraulic motor to be in a non-working state when the motor load value is smaller than a corresponding preset value, and controlling the control valve group to enable the hydraulic motor to be in a working state and enable the torque direction of the hydraulic motor to be the same as the torque direction of the motor when the motor torque value is larger than the corresponding preset value.
The control method of the double-power winch system comprises the following steps:
the controller outputs a brake control signal for releasing the brake of the brake after acquiring the unreeling signal;
the controller detects the torque of the motor and the tension of a steel wire rope on a winding drum of the winding assembly after acquiring the winding signal, calculates the braking torque of the brake in the reduction gearbox by using the torque of the motor, the tension of the steel wire rope and design parameters of the winding assembly, and outputs a brake control signal for releasing the brake of the brake when the braking torque is smaller than a preset value.
The technical scheme for realizing the purpose of the invention is as follows: the piling machinery is characterized by comprising the double-power hoisting system.
Compared with the prior art, the winch system has double powers, and the potential energy reduced when the potential energy is absorbed below the working device through the motor during the unreeling operation, so that the energy recovery is realized, and the heating of the hydraulic system is reduced.
Drawings
Fig. 1 is a structural diagram of a double-power hoisting system according to the present invention.
Fig. 2 is a hydraulic schematic diagram of the double power winch system of the present invention.
Part names and serial numbers in the figure:
the hydraulic control brake system comprises an engine 1, a clutch 2, a generator 3, a power battery 4, a motor 5, a controller 6, a winch assembly 7, a hydraulic motor 8, a main control valve 9, a main pump 10, a brake release oil cylinder 11, an electric control brake release valve 111, a pressure reducing valve 112, an operating handle 12, an enable control valve 13, a balance valve 14, a three-way three-position reversing valve 141, a one-way valve 142, a hydraulic control brake release valve group oil way 15, a shuttle valve 151, a stop valve 152 and a constant pressure reducing valve 153.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
The embodiment of the invention provides piling machinery, such as a rotary drilling rig, a continuous wall trenching machine and the like. A winch system is arranged on a rotary table of the machine and lifts working devices such as a rotary drilling rig power head and a hydraulic grab bucket machine of a continuous wall trenching machine through a steel wire rope.
As shown in fig. 1, the hoisting system of the piling machine in this embodiment is a dual-power system, and includes an engine 1, a hoisting assembly 7, a hydraulic motor 8, a control valve set for controlling the hydraulic motor, a main pump 10, and the like.
Two independent power take-off ports are arranged on the engine 1, wherein one power take-off port is connected with the main pump 10 to drive the main pump 10 to work. The main pump 10 provides pressure oil for the hoisting system and also for other hydraulic actuators on the piling machine.
The other power take-off port on the engine 1 is connected with a generator 3 through a clutch 2, and the generator 3 is connected with a power battery 4. The battery management system of the power battery 4 performs charge and discharge management according to the electric quantity of the power battery, for example, when the electric quantity of the battery is greater than 80%, the clutch 2 is disconnected, the generator 3 does not work, and the power battery 4 can output full power to the outside for operation; when the electric quantity of the battery is less than 60%, the clutch 2 is engaged, the generator 3 works to charge the power battery 4, and the power battery 4 can be operated by outputting full power outwards; when the battery capacity is less than 20%, the clutch 2 is combined, the generator 3 works to charge the power battery 4 and limit the output power of the power battery 4, and when the battery capacity is more than 40%, the power limitation is released.
The power battery 4 is connected to the electric machine 5, and the electric machine 5 can operate in a motor mode or in a generator mode under the control of its controller. In the motor mode, it converts the electrical energy obtained from the power battery 4 into mechanical energy; in the generator mode, it converts the absorbed mechanical energy into electrical energy and stores the electrical energy in the power cell 4.
The winding assembly 7 comprises a winding drum and a speed reducer, and a rotating shaft of the winding drum is connected with an output shaft of the speed reducer. The steel wire rope is wound on the winding drum, the steel wire rope bypasses the fixed pulley at the top of the mast to be connected with the working device, and the steel wire rope is wound and unwound by the rotation of the winding drum, so that the purpose of lifting or lowering the working device is achieved.
The rotating shaft of the motor 5 is connected with the input shaft of a speed reducer, and a brake is arranged in the speed reducer and used for braking the input shaft.
As shown in fig. 2, the main pump 10 is connected to the hydraulic motor 8 through a control valve set, the control valve set includes a main control valve 9 having two working oil ports connected to the two working oil ports of the hydraulic motor, and an enable control valve 13 for controlling whether torque is transmitted between the hydraulic motor and the winch assembly, and the main control valve 9 and the enable control valve 13 are both solenoid valves connected to the controller 6.
In the present embodiment, the rotating shaft of the hydraulic motor 8 is connected to the input shaft of the reduction gear. The enabling control valve 13 is connected between two working oil ports of the hydraulic motor 8 and is a two-position two-way electromagnetic valve, when the two working oil ports of the hydraulic motor 8 are communicated, a loop is formed, the hydraulic motor 8 is in a floating state, pressure oil from the main control valve 9 cannot drive the hydraulic motor to rotate, the hydraulic motor 9 freely rotates under the anti-dragging acting force of the speed reducer, and only a small part of energy is absorbed to overcome the rotation resistance of the hydraulic motor.
In this embodiment, the rotating shaft of the hydraulic motor 8 may be connected to the input shaft of the speed reducer through a clutch, the hydraulic motor may not be provided with a valve for opening or closing the two working oil ports, and the clutch control valve for controlling the clutch to be disengaged or engaged constitutes an enable control valve, so that after the enable control valve disengages the clutch, the connection between the speed reducer and the hydraulic motor is disconnected, and torque cannot be transmitted.
The hydraulic motor 8 is provided with a balance valve 14 for limiting the return flow of the hydraulic motor. Two working oil ports of the hydraulic motor 8 are connected with two working oil ports of the main control valve 9. When the hydraulic motor 8 works, one of the two oil paths is a high-pressure side oil path, oil flows to the hydraulic motor, the other oil path is a low-pressure side oil path, and the oil flows from the hydraulic motor to the direction of the main control valve and returns to the oil tank through the main control valve 9. As shown in fig. 2, the balance valve 14 mainly includes a three-way three-position directional valve 141 and four check valves 142, when the pressure of the high-pressure side oil line reverses the three-way three-position directional valve 141, the return oil of the hydraulic motor 8 flows to the main control valve 9 through the damping holes in the three-position directional valve, and the flow of the return oil of the hydraulic motor 8 is limited due to the damping effect of the damping holes in the three-position three-way valve, so as to prevent the hydraulic motor 8 from rotating too fast and causing the stalling of the hydraulic motor.
The brake is arranged in the speed reducer and used for braking an input shaft of the speed reducer, the brake comprises a brake release oil cylinder 11 and an electric control brake release valve 111 connected with the brake release oil cylinder, the electric control brake release valve 111 is connected with the main pump 10 through a pressure reducing valve 112, and the brake release oil cylinder 11 is connected with the hydraulic oil tank through a damping hole 113 and a pipeline. When the electric control brake release valve 111 is in a power-off cut-off state, the piston of the brake extrudes oil in the brake release oil cylinder 11 under the action of the brake spring, so that the oil flows to the hydraulic oil tank through the damping hole 113 and the pipeline, and the brake realizes braking under the action of the brake spring. When the electric control brake release valve 111 is energized, pressure oil provided by the main pump 10 flows to the brake release cylinder 11 of the brake through the pressure reducing valve and the electric control brake release valve 111, and pushes the piston to overcome the elastic force of the brake spring, thereby realizing brake release. When the brake is released, a small part of oil can be lost from the damping hole 113, and the lost oil is supplemented by the oil flowing in through the pressure reducing valve and the electric control brake release valve.
The control valve group further includes a hydraulic brake release valve group oil path 15, and the hydraulic brake release valve group oil path 15 includes a shuttle valve 151, a stop valve 152, and a fixed-value pressure reducing valve 153.
Two oil inlet ends of the shuttle valve 151 are communicated with two working oil ports of the main control valve 9. The oil inlet end and the hydraulic control end of the stop valve 152 are both connected to the oil outlet end of the shuttle valve 151, and the oil inlet end and the oil outlet end of the stop valve 152 are conducted when the pressure of the oil inlet end is greater than a preset pressure value. The oil inlet end and the oil outlet end of the constant pressure reducing valve 153 are connected to the oil outlet end of the cut-off valve 152 and the brake release cylinder 11, respectively.
When the hydraulic motor 8 is used alone to perform reeling and unreeling operations, the main control valve 9 is reversed, one working oil port of the main control valve 9 outputs high-pressure oil, the other working oil port is used for oil return, when the pressure output by the working oil port reaches a preset value, the pressure oil acts on a hydraulic control end of the stop valve 152 through the shuttle valve 151 to enable the stop valve 152 to be conducted, the high-pressure oil flows to the brake release oil cylinder 11 after being decompressed by the fixed value decompression valve, so that the brake performs brake release actions, at the moment, the hydraulic motor 8 can also generate corresponding torque under the action of the pressure oil, and the brake release of the brake cannot cause a working device to pull the winch assembly to rapidly descend through a steel wire rope.
In this embodiment, the winding system further includes a controller 6 and an operating handle 12 connected to the controller 6, where the operating handle 12 is used for winding and unwinding the winding drum, and when the winding drum is swung, the winding system correspondingly sends a winding signal and an unwinding signal to the controller.
The electric control brake release valve 111, the main control valve 9 and the enable control valve 13 are connected with a controller, and the controller 6 is connected with a motor controller of the motor 5 through a bus to transmit related control instructions. The controller 6 controls the working modes of the brake and the motor according to the winding signal or the unwinding signal of the operating handle 12, and controls the working state of the hydraulic motor through the control valve group according to the load condition of the motor.
The winch system also comprises a detection device for detecting the load of the motor, and when the load of the motor is greater than a corresponding preset value, the controller controls the control valve group and the hydraulic motor to enable the hydraulic motor to be in a rotating working state, and the torque direction of the hydraulic motor is the same as that of the motor; and when the load value of the motor is smaller than the corresponding preset value, the control valve group is controlled to enable the hydraulic motor to be in a non-working state. When the motor is in a motor working mode, the detection device can calculate the power of the motor as the load of the motor by detecting the torque of the motor or detecting the related parameters of the motor, and if the load value of the motor is smaller than the preset value when the motor is used as the motor, the hydraulic motor is in a non-working state and is driven only by the motor by controlling the control valve group; on the contrary, if the load value of the motor is larger than the preset value when the motor is used as the motor, the hydraulic motor is in a working state by controlling the control valve group, the hydraulic motor obtains pressure oil from the main pump and is used as a driving part to convert hydraulic energy into mechanical energy, the mechanical energy and the mechanical energy are used for driving the winch assembly together, and the steel wire rope is wound to realize the lifting of the working device.
The working parameters of the motor can be obtained through communication and sharing of the controller and the motor controller, and related components in the motor form a detection device for detecting the load of the motor and an acquisition device for acquiring the torque of the motor. When the motor operates as a motor or a generator, relevant parameters such as output power and output torque when the motor is used as the motor and rotation speed and power generation when the generator is used as the generator can be obtained from a motor controller, and the controller can calculate the load of the motor and the torque output when the motor is used as the motor according to the parameters.
The hoisting system also comprises a tension sensor for detecting the tension of the hoisting steel wire rope. The gravity of the working device acts on the steel wire rope, a torque in the unwinding direction is generated on the winding drum, the torque is transmitted to a brake connecting shaft connected with the brake through a gear shaft system in the speed reducer, and the torque on the motor rotating shaft also acts on the brake connecting shaft through a shaft. When the brake is not released, the braking torque acted on the brake connecting shaft by the brake is equal to the difference value between the torque acted on the brake connecting shaft by the moment of the winding drum and the torque acted on the brake connecting shaft by the motor, when the braking torque is smaller than a preset value, for example, is close to zero, the acting force of the torque of the rotating shaft of the motor on the winding drum through the shaft system is equivalent to the pulling force of the steel wire rope, the brake of the brake is released at the moment, the working device cannot suddenly drop, and the operation is stable.
The control method of the dual-power winch system in the embodiment is as follows:
in a normal state, when the operating handle is not operated, the electric control brake release valve and the main control valve are both in a power-off state, the enable control valve is in a power-on state, the electric control brake release valve is in a cut-off state, and the brake realizes braking by the elasticity provided by the brake spring in the brake. The enabling control valve is in a conducting state, the hydraulic motor is in a floating state, the main control valve is in a middle position, pressure oil of the main pump cannot flow to the hydraulic motor through the main control valve to enable the hydraulic motor to rotate, and the motor is in a stopping state.
When the operating handle is operated and the controller receives an unreeling signal, the controller controls the control valve group to enable the hydraulic motor to be in a non-working state, wherein the enabling control valve is in a conducting state, and the main control valve is in a middle position. The controller controls the motor to work in a generator state, and simultaneously controls the electric control brake release valve to be in a conducting state to release the brake of the brake. The working device pulls the steel wire rope to fall from a standstill. The steel wire rope drives the winding drum to rotate, the speed reducer reversely drags the motor to rotate to generate electricity, and electric energy generated by the motor is stored in the power battery. During the power generation of the motor, the load of the motor is detected, for example, the rotation speed of the motor or the generated power of the motor is detected. When the detected value is larger than the corresponding preset value, the lowering speed of the working device is too high, safety risks are caused, the working device is not safely lowered only by means of the fact that the potential energy absorbed by the motor is insufficient, the controller controls the control valve group at the moment, the main control valve is reversed, the enabling control valve is reversed to the stopping position, the hydraulic motor works in an oil-passing mode, torque for preventing the winding drum from being lowered and rotated is generated, the unwinding speed is reduced together with the motor, and the working device is safely lowered.
When the operating handle is operated and the controller receives a winding signal, the controller controls the control valve group to enable the hydraulic motor to be in a non-working state, wherein the enabling control valve is in a conducting state, and the main control valve is in a middle position. The controller controls the motor to work in a motor state and enables the brake to keep a braking state. The motor obtains electric energy from the power battery to generate rolling torque. The controller detects and obtains motor torque and steel wire rope tension on a winding drum of the winch assembly, calculates braking torque of a brake in the reduction gearbox by using the motor torque, the steel wire rope tension and winch assembly design parameters (transmission ratio, transmission efficiency and the like), and outputs a brake control signal for releasing the brake of the brake when the braking torque is smaller than a preset value (for example, the braking torque is close to zero) so as to release the brake of the brake. The torque of the motor rotating shaft is equivalent to the tension of the steel wire rope through the acting force of the reducer shaft system on the winding drum, the brake of the brake is released at the moment, and the working device cannot drop suddenly, so that the operation is stable.
The motor drives the winding drum to rotate through the reduction gearbox, and the working device is lifted through winding the steel wire rope. At the moment, the controller acquires the working parameters of the motor, such as power, torque and the like, calculates the load of the motor, and judges whether the motor runs in an overload mode. When the motor is judged to be in overload operation, the control valve group of the hydraulic motor is controlled to enable the hydraulic motor to be in a working state, and the torque output by the hydraulic motor and the torque output by the motor act on the speed reducer together to drive the winding drum to perform winding operation together.
In this embodiment, when power battery, motor etc. break down, can not carry out the operation, still can use hydraulic motor alone to receive and release the roll operation. The control process at this time is as follows: the controller controls the main control valve to change direction according to an operating handle signal, and enables the electric control brake release valve to be in a stop position, when the pressure output by the main control valve reaches a preset value, pressure oil enters a brake release oil cylinder of the brake through an oil way of the hydraulic control brake release valve set to release the brake of the brake, and the hydraulic motor drives the winding drum to rotate through the speed reducer, so that winding and unwinding operations are realized.
In the embodiment, under the condition that the system is normal, the electric motor is mainly used for working, and the hydraulic motor is used for assisting when exceeding the load range of the electric motor. When unreeling, the potential energy that reduces when absorbing the equipment below through the motor realizes energy recuperation, reduces hydraulic system and generates heat.
Claims (10)
1. The utility model provides a double dynamical hoist system, includes the engine, is used for driving the hydraulic motor of hoist assembly, is used for controlling hydraulic motor's valve unit, supplies oil and by engine drive's main pump to the valve unit, its characterized in that still includes:
the generator is driven by the engine and is connected with the power battery;
the brake is used for braking the winch assembly and is in a braking state in a normal state;
the operating handle is used for winding and unwinding the winding drum;
the motor is connected with the power battery and is used for driving the winch assembly or reversely dragging the winch assembly to rotate to generate electricity and store the generated electric energy in the power battery;
the detection device is used for detecting the motor load;
the controller is used for controlling the working modes of the brake and the motor according to the winding signal or the unwinding signal of the operating handle, and when the load of the motor is greater than a corresponding preset value, the controller controls the control valve group and the hydraulic motor to enable the hydraulic motor to be in a rotating working state, and the torque direction of the hydraulic motor is the same as that of the motor; and when the load value of the motor is smaller than the corresponding preset value, the control valve group is controlled to enable the hydraulic motor to be in a non-working state.
2. The dual-power winch system according to claim 1, wherein the control valve set comprises a main control valve having two working oil ports connected to the two working oil ports of the hydraulic motor, and an enable control valve for controlling whether torque is transmitted between the hydraulic motor and the winch assembly, wherein the main control valve and the enable control valve are solenoid valves connected to the controller; and a balance valve for limiting the oil return flow of the hydraulic motor is arranged on the hydraulic motor.
3. The dual-power winch system according to claim 2, wherein the enabling control valve is a two-position two-way solenoid valve having two ends respectively connected to the two working oil ports of the hydraulic motor.
4. The dual-power winch system according to claim 2, wherein a clutch is provided between the output shaft of the hydraulic motor and the winch assembly, and the enable control valve is disposed on the clutch control oil path for controlling the clutch to be engaged or disengaged.
5. The dual-power winch system according to claim 3, wherein the brake comprises a brake release cylinder and an electrically controlled brake release valve connected to the brake release cylinder, the electrically controlled brake release valve is connected to the main pump via a pressure reducing valve, the electrically controlled brake release valve is electrically connected to the controller, and the brake release cylinder is connected to the hydraulic oil tank via a damping hole and a pipeline.
6. The dual-power winch system according to claim 5, wherein the control valve assembly further comprises a hydraulically-controlled braking release valve assembly oil path, and the hydraulically-controlled braking release valve assembly oil path comprises:
the two oil inlet ends of the shuttle valve are communicated with the two working oil ports of the main control valve;
the oil inlet end and the hydraulic control end of the stop valve are both connected with the oil outlet end of the shuttle valve, and the oil inlet end and the oil outlet end are communicated when the pressure of the oil inlet end is greater than a preset pressure value;
and the oil inlet end and the oil outlet end of the constant value pressure reducing valve are correspondingly connected with the oil outlet end of the stop valve and the brake release oil cylinder.
7. The dual-power hoisting system of claim 5, wherein the dual-power hoisting system further comprises a tension sensor for detecting tension of the hoisting steel wire rope, and the detecting device comprises an acquiring device for acquiring torque of the motor;
the controller is also used for calculating the braking torque of the brake according to the tension of the steel wire rope, the torque of the motor and the design parameters of the winch assembly after acquiring the winding signal of the operating handle and outputting a control signal for releasing the braking action of the brake when the braking torque is smaller than a preset value.
8. A control method of a dual power hoisting system for controlling the dual power hoisting system of any one of claims 1 to 7, characterized by comprising the steps of:
the controller outputs a brake control signal and a motor control signal according to the acquired winding signal or unwinding signal of the operating handle, so that the motor correspondingly works in a motor mode or a generator mode; and obtaining a motor load value, controlling the control valve group to enable the hydraulic motor to be in a non-working state when the motor load value is smaller than a corresponding preset value, and controlling the control valve group to enable the hydraulic motor to be in a working state and enable the torque direction of the hydraulic motor to be the same as the torque direction of the motor when the motor torque value is larger than the corresponding preset value.
9. The control method of the dual-power winch system according to claim 8, wherein:
the controller outputs a brake control signal for releasing the brake of the brake after acquiring the unreeling signal;
the controller detects the torque of the motor and the tension of a steel wire rope on a winding drum of the winding assembly after acquiring the winding signal, calculates the braking torque of the brake in the reduction gearbox by using the torque of the motor, the tension of the steel wire rope and design parameters of the winding assembly, and outputs a brake control signal for releasing the brake of the brake when the braking torque is smaller than a preset value.
10. A piling machine characterised by a dual power winching system as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211488309.0A CN115744699A (en) | 2022-11-25 | 2022-11-25 | Double-power winch system, control method and piling machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211488309.0A CN115744699A (en) | 2022-11-25 | 2022-11-25 | Double-power winch system, control method and piling machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115744699A true CN115744699A (en) | 2023-03-07 |
Family
ID=85337792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211488309.0A Pending CN115744699A (en) | 2022-11-25 | 2022-11-25 | Double-power winch system, control method and piling machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115744699A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620625A (en) * | 2022-03-18 | 2022-06-14 | 山河智能装备股份有限公司 | Power recovery system and power recovery method for hoisting mechanism of engineering machinery |
| CN118206037A (en) * | 2024-05-21 | 2024-06-18 | 中联重科股份有限公司 | Winding device, using method thereof and rotary drilling rig |
-
2022
- 2022-11-25 CN CN202211488309.0A patent/CN115744699A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620625A (en) * | 2022-03-18 | 2022-06-14 | 山河智能装备股份有限公司 | Power recovery system and power recovery method for hoisting mechanism of engineering machinery |
| CN118206037A (en) * | 2024-05-21 | 2024-06-18 | 中联重科股份有限公司 | Winding device, using method thereof and rotary drilling rig |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115744699A (en) | Double-power winch system, control method and piling machinery | |
| CN108978775B (en) | Series-parallel mechanical hybrid power system for excavator based on flywheel | |
| CN102153027B (en) | Stepless regulation constant tension device for hydraulic winch | |
| CN103601088A (en) | Large load sensitive type tension-releasing hydraulic dragging winch | |
| CN108706463B (en) | Hydraulic control system of crane | |
| CN102556872B (en) | Rope unwinding hydraulic control system, rope winding hydraulic control system and crane | |
| CN103470544A (en) | Energy-saving hoisting system of hydraulic crane | |
| CN101941620A (en) | Reel hydraulic device with reel free quick-release floating control | |
| WO2013086882A1 (en) | Crane, and closed-type hoist negative power control system for use with crane | |
| CN114604791B (en) | Power recovery system and power recovery method for hoisting mechanism of engineering machinery | |
| CN108978774B (en) | Series-parallel hybrid power system for excavator | |
| WO2016082321A1 (en) | Method and system for recovering and utilizing duty energy of crane, and crane | |
| CN203463385U (en) | Energy-saving hoisting system of hydraulic crane | |
| CN201132745Y (en) | Hydraulic lifting device for column crane | |
| CN105523493B (en) | A kind of power back-off formula workover rig power drive system | |
| CN110963430B (en) | Hydraulic control device and hydraulic control method for winch | |
| CN104865083A (en) | Multi-rope friction hoist load simulation hydraulic loading device | |
| CN116253264A (en) | Safe lowering control method and system for electric drive winch and rotary drilling rig | |
| CN114084825B (en) | Mechanical and hydraulic combined recovery and regeneration integrated winch driving system | |
| CN203627359U (en) | Crane for foundation pile construction and hydraulic system thereof | |
| CN112726605B (en) | Combined winch hydraulic system of ultra-large pile driving ship | |
| CN109502494B (en) | Deep sea cable winding and unwinding hydraulic system | |
| CN202440264U (en) | Electrical-energy type emergency back-up load releasing device of cane with power off | |
| CN202829410U (en) | Rope unwinding hydraulic control system, rope winding hydraulic control system and crane | |
| CN102389911B (en) | Equipment for installing steel wire rope and engineering vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |